Additional note: at periodic intervals, this Ganador summons three special NPC ships. If they are not sunk in time, they each grant a special item to the Ganador which can be used to attack players or empower the Ganador and his fleet. The ships/effects are:
Tang Imperial Merchant Ship -
Shen Nung's Medicinal Herbs (revives fallen sailors)
Japan Dispatch Merchant Ship -
Amaterasu Mirror (grants temporary immunity to cannonfire)
Sillian Merchant Ship -
Hwanung Scented Fern (damages rudders and inflicts seaweed status to all)
Each ship sunk removes one power-up from Bogo's arsenal. Should you sink the entire merchant fleet, he will be temporarily panicked and especially vulnerable to melee (which also happens to be the only way to actually defeat this enemy) -- choose your targets well. Cheers.